Hello Hans Christian,

 

It is Ptg. 10 that has the + under OF67 and perhaps therefore I should be referring to the stamp coming from this printing and not printing 11. But as it has inverted frame, which position in the bottom row of Ptg. 10? All position in Ptg. 10 bottom row have OFs except pos. 95 and 99 and neither have RM5A?

 

I have re-examined the stamp under better light today. The frame color is plain grey and I would say it is slightly woolly. The oval is green, slightly deeper than the light yellowish green of ptg. 11 and that now leads me to think Ptg. 10 on colors - dark emerald green, and plain grey a little woolly.

The watermark is very difficult to see being part at bottom left and larger part at bottom right when viewed from back of stamp but it is Wmk. III. The postmark does not help when trying to see the watermark! I have tried to scan showing the watermark but with no success.

 

I have eliminated Ptg. 6 and Ptg. 7 due to RM5A being present as OF 67 in the stamp.

OF67 in Ptg. 6 pos. 75 (RM5D) and Ptg.7 pos.97 (RM5D). Printings 8 and 9 also eliminated as OF67 not on a stamp with inverted frame. Same applies to Ptg. 12 and 13.

 

From the scan I think you can see RM5A and also OF67 (certainly the dot in 'A' of 'DANMARK' and the dot in the 'M' of 'POSTFRIM').

 

Kind regards

David